I am inheriting an old electric kiln. It has three stackable heating elements and the data plates on each stacking ring says "Petterson Multi-Unit Kiln", I can't seem to find much about this on Google.
The data plates each specify a maximum temperature of 1950°F (1065°C), and are rated at 250V, with 10A, 10A, and 9A current ratings (each with its own cord). When all three are used together, would this kiln be capable of getting hotter than 1950°F, such as to fire stoneware or porcelain (cone 6 to 10)?
Also, is there a preferred way to test the kiln to ensure it is functioning correctly?